Another use for left-over hand-grenades!!

This little gem was put together by a friend after I gave him a bunch of these test/practice grenades found by me in a house I was renovating.
He actually pulled the pin,tossed the grenade into his downtown rear yard, and was deafened by the resulting explosion., as were his neighbors! He quickly picked up and hid the evidence,and later put together this little piece for me. We had no idea the firing detonators were that powerful. Lesson learned.